Dandy-roll.



ALBERT C. MCDONALD, OF KALAIVIAZOO, MICHIGAN.

D ANDSLROLL.

Specification of Letters Patent.

Application filed April 4, 1912.

Patented Aug, 26,1913. serial no. 688,495. l

To all who/m it mm/ concern lic it known that l, ALBERT C. McDoN- am, acitizen of the United States, residing` at Kalamazoo, in the county of`Kalamazoo and Sita te of liiichin'an, have .invented certain new anduseful lmproi/*en'ients in lanfglyliolls, of which the following is aspecification.

This invention relates to new and useful iinj'novcments in dandy rollsand is designed particularly to construct a device of this nature whichwill increase the etliciency of devices of this type. landy rolls areused A upon the wet end of the paper machine and are designed to finishthe top side of the paper and also water mark the same. As these rollsoperate upon the paper while the saine is in a soft or pliablecondition, they will naturally ,ent-her r accumulate a quantity of foamwater, and stock, which must be discharged by some method if the roll isto operate properly. ln the rolls heretofore used, an attempt has beenmade to produce such a discharge preferably at the ends of the roll, butit has been found that these rolls have not been very successful, and inthe majority of instances the rolls have become dammed and fail tooperate as desired. The present invention is designed to overcornethisobjectionable feature in the rolls now in use by providing' a meanswhereby a continual discharge may be had at the end of the roll, keepingthe latter clear of accumulated foam and water and thereby preventina;the rolls from damming.

lith the above and other objects in view, this invention consists in theconstruction, combination, and arrangement of parts, all as will behereinafter more fully described, illustrated and claimed, whereinlTirgure 1 is a diametrical view illustratin o; the shell of the rollflattened out. Fig. 2 is a side elevation of the dandy rollillustratinpr the rarious sections thereof, broken away for the purposesof illustration.

1deference being had more particularly to the drawing', 10 indicates ametal rino; .located at each end of the roll having a number, preferably4t, of radially extending arms 11 located upon the interior thereof,whereby a stub shaft 12 is secured to each ring; 10 for the mounting` ofthe roll. A plurality of parallel longitudinal ribs or wires 13 areinterposed between the heads or rings 10, said ribs or wires 13constitutthe inner surface or base of the shell of the roll. A pair ofparallel wires 14, spaced substantially one-half inch apart, are woundspirally above the ribs or wires 13 from one plate 10 continuously tothe opposite plate 10, forming a channel upon the exterior of said ribsor wires 13, of about one-half inch in width. This channel isparticularly constructed to conduct the foam, stock and water gatheredby the dandy roll to the ends thereof, in order that the same maydischarge, and the utility of the roll be in no way impaired thereby. Inorder to brace these channel forming' wires 14, and to prevent anylongitudinal movement thereof, a wire 15 is interposed be tween thewires of each set. This wire 15 is staggeredly arranged between theadjacent wires 14 and is secured to said wires by a soldering' or othersuitable means at equidistant intervals, as is clearly illustrated inthe drawing. F rom this construction it will readily be seen that thewires lli, forming` in combination a conducting channel, are preventedfrom any movement whatsoever upon the wires or ribs 13, and are retainedby the wire 15 in a fixed position. The entire structure is wound with aspring brass wire 16 which extends throughout the entire length of theroll and completely covers the entire mechanism. An outer cover or brasswire gauze or cloth 17 incases the entire shell or roll and constitutesthe bearing' surface thereof.

By the foregoing' construction it will be seen that as the roll operatesupon the wet paper, the foam, stock, and water will pass through thebrass wire, cloth or gauze 17 through the winding wire 16 and into theinterior of the shell. The water, foam, etc., will naturally, bygravity, be retained at the lower terminal of the vertical diameter ofthe roll, and thus will positively Contact with the channels formed bythe wires 141. The rotation of the roll will therefore carry the foam,stock, etc., to one end of the roll, where it will be discharged.

l-hivingl thus fully described my invention, what I claim as new anddesire to secure by U. S. Letters Patent, is

In a dandy roll, the combination with a pair of spaced rings, of aseries of longitudinally extending parallel wires or ribs inbetween saidspirally arranged Wires, for" terposed between said rings, a pair ofc0n- In testimony whereof I aiiiX lny signature tinuous spaced Wiresspiraily encircling said in presence of tWo Witnesses.

ribs or Wires, constituting in combination, ALBERT C. MGDONALD. achannel, and a staggered Wire arranged VitnesSes:

CHARLES L. DIBBLE,

retaining same in a fixed position. CLAUDE S. CARNEY.

Copies of this patent may be obtained for ve eents each, by 4addressingthe Commissioner of Patentsv Washington, D. C.

